The Trabecular Metal Tibial Baseplate of the Zimmer Persona Knee was Recalled on January 21, 2015. These knee implants had a high failure rate as a result of loosening of the tibial plate in the implant. These implants had been on the market since November 7, 2012. The implants that are failing are the uncemented implants. This knee implant also had a version that was used with cement and that version seems to be performing well.
They symptoms of a failing implant are radiolucent lines on x-rays and pain. The radiolucent lines on x-ray indicates that the bone in the tibia has not grown into the tibial base of the implant. This implant is designed to be hammered onto the tibia and then the tibia is supposed to grow into the porous surface of the bottom of the tibial plate. Apparently there is a design defect in the porous coating or the shape of the base plate that prevents the bone from growing into the plate and it becomes loose. This type of loosening is called aseptic loosening. This means that it becomes loose in the absence of infection. Infections can also cause knee implants to become loose and fail.
Zimmer sold 11,658 of these knee implants worldwide. In the U.S. they were sold in AK, AL, AZ, CA, CO, FL, IL, IN, KS, MA, MI, MN, MO, NC, NJ, NY, OH, OK, PA, TN, TX, UT, VA, WA, and WI. The recalled product numbers are: 42-5300-064-01, Size C, Left -02 Right
42-5300-067-01, Size D, Left -02 Right
42-5300-071-01, Size E, Left -02 Right
42-5300-075-01, Size F, Left -02 Right
42-5300-079-01, Size G, Left -02 Right
42-5300-083-01, Size H, Left – 02 Right
42-5300-088-01, Size J, Left -02 Right
If you have a knee implant that is failing or has failed you should get legal advice immediately as there are time deadlines for filing claims. Our firm is specialized in this area of the law and we can review your claim at no cost to you and our fee is a percentage if we obtain a money recovery for you.